Business Dispositions (Details 1) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Discontinued Operations Income Statement Disclosures (Table Amounts)
Gain on divestitures		$ 10	$ 446
Earnings (loss) from discontinued operations, net of tax	32	149	252
Assets
Current assets	7,746	13,774
Property, plant, and equipment, net	3,047	3,045
Goodwill	12,374	12,376
Other assets	14,618	14,591
Total assets of discontinued operations		5,212
Liabilities
Trade accounts payable	1,481	1,573
Other current liabilities	1,668	1,763
Total current liabilities	6,135	10,027
Shipbuilding Segment
Discontinued Operations Income Statement Disclosures (Table Amounts)
Sales and service revenues	1,646	6,711	7,740
Earnings from discontinued operations	59	229	345
Income tax expense	(28)	(95)	(111)
Earnings, net of tax	31	134	234
Gain on divestitures	2	10	446
Income tax (expense) benefit	(1)	5	(428)
Gain on divestitures, net of tax	1	15	18
Earnings (loss) from discontinued operations, net of tax	32	149	252
Assets
Current assets	0	1,315
Property, plant, and equipment, net	0	1,997
Goodwill	0	1,141
Other assets	0	759
Total assets of discontinued operations	0	5,212
Liabilities
Trade accounts payable	0	274
Other current liabilities	0	955
Total current liabilities	0	1,229
Other liabilities	0	1,563
Total liabilities of discontinued operations	$ 0	$ 2,792